Frederic s



No. 623,6I3. l Patented Apr. Z5, |899.

F. S. KILLER.

ASPHALT IELTER.

I (Application Mod Tuna 90, 1.898.)

(llo lodal.)

UNITED STATES PATENT 'OFFICE FREDERIC s. MILLER,

OF NEV YORK, N. Y.

ASPHALT-Mauren.-

Application filed June 20, 1898.

To all wI/omit irl/(Ly concern:

Be it known that I, FREDERIC S. MILLER, a citizen of the United States of America, and a resident of NewYork, borough of Brooklyn,

county of Kings, State of New York, have invented certain new and useful Improvements in Asphaltumdtlelters, of which the following is a specification. f

My invention relates to the economical and no continuous meltingr of asphaltum orl similar pitchy substances, and is designed tosecure the same by the direct application of the heat in a furnace Without subjecting the asphaltu m to the-danger of spoiling byoverheating, as

- l5 is commonly the case in 'the pse of the ordinary apparatus.

Asphaltumnxelts at or aboutthc tempera tu re of 325C Fahrenheit; but the subjecting of the same to any considerable ecess. tem- :o peratureimmediately and completely spoils the asphaltum and renders it valueless for the uses to which it is'ordinarily applied.

Asphaltum'is usually supplied to the trade in lumps and large masses,`which have to be z 5 broken 4u p and melted in order to use the as A3o designed the 4herein described apparatus,

which is ill ustrated .inV the accompanying sheet o f drawings, in which- Figure 1 a vertical centralsection of my apparatua'and Fig. -2 is a detail vdrawing showing the'jin'ternal wire screen.

Throughout the 4dravvings like referencefignres refer to like parts.

l represents an ordinary iron kettle, which is mounted in the re-bozcs'hell 2, in -which is ,asphaltum to any suitable receptacle.

.kettle and rapidly runs out through the discharge-pipe before it hasapchance to be sub- Berisl No. 083,961. (No model.)

the top of the kettle, but leaves a considerable portion of the upper interior of said kettle uncovered.

9 isa discharge-pipeconnected to the lowest point in the kettle and carrying the melted (Not shown.) Inasmuch 'as the discharge-pipe passes through the fire-box or furnace it is advisable to protect that ortion of it in said furnace by a suitable en elop l0 of asbestos reproof cement or other nonheat-conducting material.

The operation of my invention is as follows: A 're is built in the furnace of coal or other suitable fuel and maintained to prod nce sui'cientheat to melt the asphaltum in the The asphaltuni .is charged into thev kettle in sucient quan tity to ll the same to the top. The nettingr 7 prevents thelarge lumps of asphaltum from falling down into contact with the kettle,

- which frequently attains a temperature sucient to burn them. It also prevents such lumps and any impurities from collecting in -the mouth of the discharge-pipe and checkretaining it until it reaches 'a destructive temperature. At the saine time the upper portion of the charge packs down solidly against the upper pdrtion of. the sides of y the kettle and forms a roof, which retains the hot air in 'the kettle, tl'tus facilitating the melting.

The asphaltum as melted from the' surface ofthe lumps drips down tothe bottom of the j ected to a destructive temperature. The sheathing on the dischargefpipe prevents the ingthe iiow ofmelted asphaltum, and lthus saine from becoming -rheatedto a dangerous degree.

The advantages of my invention consist in its economy, enabling asphaltumto bemelted in comparatively small quantities by the directaction of re on the bottom of the'kettle,and in thecontinuous nature of the opera- 4o the ordinary form of grate 3, with fire-brick lining4 for theiire-box proper. l

5 represents the supports-for the apparatus, and 6 is aSmOke-stack. i

In the lower portion of'the kettle l I place c a netting 7, which-has suitable projections 8 formed thereon or connected thereto for holding the netting at adistance of an inch-or so from the bottom and lower sides of the kettle.

This netting may be made of large mesllI--two 5o inches or thereabout. It does not extend to tion, the cool asphaltumbeing continuously piled up on top of the kettle, where it is in a temperature sufficiently low so that the workmen can get .on top of it and break up the lumps by pounding. and, lastly and mainly, roo

-ing temperature and cannot for dammed up in the kettle.

v'in the fact that the as'phaltum cannot be overheated, as itrnns out of the apparatus within avery short Vtime after it is raised to a melt- ,Varions changes could be made inv the de,-

` tails of construction of my apparatus without departing from the spirit and scope of the invention sollongr as the relative arrangement of parts illustrated in the drawings and mode l of operation described in the specification are ranged in the lower preserved. l

Having therefore described Amy invention, what! claim as'fnew, and desire to protect by Letters Patent, is-

A1.-'1 In an apparatus for melting asphaltuni,

p the combination of a kettle, the furnace therennder, the discharge-pipe connected Vto the lowest point of the kettle, andthe netting arranged in the lower portion hecome clogged,

ingr material aronnd that portion of the discharge-pipe inside of the furnace.

3. In an apparatus for melting asphaltnm, the combination of a kettle, the furnace thereunder, the discharge-pipe connected to the.

lowest 'point of said kettle, and the netting arranged inthe lower portion of said kettle, the said netting extending only a portion of the way up the sides of the kettle, substantially as described.

4. In an apparatus for melting asphaltum, the combination of a kettle, the furnace thereunder, the discharge-pipe connected to the lowest point of said kettle, and the' netting-l arranged in the lower portion of said kettle and extending only a portion of the wayup the sides thereof, together with the sheathing of non-heat-conducting material around that portion of the discharge-pipe inside of the furnace, substantiallyv as described.

Signed by me, at New York cit-y, this 16th' day otJune, 1898.- v

FREDERIC s'. MILLER.,

Witnesses:

JOHN E. MEEK, p GEORGE W. GOODWIN. 

